Hoisting mechanism.



E. Y. MOORE. HOISTING MECHANISM. APPLICATION rum) DEC. 2a, 1913 PatenugiSept. 29. 1914.

' SHLIUN SHEET 1.

E. Y. MOORE. HOISTING MECHANISM. APPLICATION runnnno. 29, 1913,

2 SHBETS- SHBET 2.

DU /17555255 v JEN/0H WM W1 014 79615;,

Patented Sept. 29, 19145.

acteristics aresunnnariaed in the claims.

dinary chain 20.

var

ljlhll an s rarns PATENT OFFICE.

HOISTING MECHANISM.

nitrates. sp ifi a of Letters rmnt- Patented Sept. 29, 1914..Application filed December as, 1913. Serial No. 809,309.

1 and 2) the two sprocketwheels are rotated together and act after the-mannerof the well-known differential pulley. I

Rigid with the sprocket. wheel 16 is a as second set of clutcnteetlr'ZZ-K, these teeth being shown as carried'on a disk 2 Lsurrounding the hub of the'spr'ocket wheel 16 and rigidly bolted to itthrough spacing sleeves 26. The teeth 23 are adapted to cooperate mgwith teeth 27 projecting from the face of the disk 28 which is formed onor secured to the frame standard 11.

From the construction described, it follows that, if the sprocket wheel16 is shifted toward the left from its position in Figs. 1 and 2, itbecomes locked against rotation. This anchors the chain which surroundsthat pulley, so that a rotation of the pulley makes a. direct pull onthe chain, thus n driving; it at a much more rapid speed than thediiierential drive.

The chain is endless. Starting the de scription of its course with thepulley 16, the chain passes oil of the front edge of this so pulley bythe reach 30 over the lifting sheave 31, thence via the reach 32 to therear edge of the pulley 15; from the front, edge of this pulley a reachchain 33 extends around the idle pulley 34:, from whence the n reach 35leads to the rear edge of-the pulley 1G. The lifting pulley is connectedin a suitable manner-with the loadffor example, by the chain shown asleading'froin the hook 1-1 of the pulley 31 over one or more a idlers 42 to the load 4.3. Thejdle pulley 34: is suitably supported, and I finda convenient way to do this is to connect it by a cable with the hook4:1, this cable extending over the idler 4:6. .3

\Vith the construction described, if the main shaft 13 is rotated bysuitable mechanism, the chain extending around the lifting pulley 31 ispulled downwardly to raise the load or fed upwardly to lower the load,and such descent or rising of the load pulley 31 gives a complementarymovement to the idle pulley 3% to take up the slack in the chain. Fordirect driving, the pulley 16 is held stationary by shifting it so thatit clutches with the stationary" teeth 27. This looks the chain reach 30and then, if the rotation of the main shaft is in adirection to'pulldown on the reach 32, the load is aised rapidly. If the direction ofrota- 119 tion of the shaft is opposite, the' load is lowered rapidly.If, on the other hand,

To all whom it may concern:

Be it known that l, Enwann Y. Moons, a citizen of the United Eitates,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful improvement in Hoisting Mechanism, ofwhich the following 13 a full, clear, and exact description, referencebeing had to the accompanying drawings.

The object of this invention is to provide an etlicient hoistingmechanism adapted atwill to raise or lower its load slowly and graduallyor comparatively rapidly. To this end I have provided two adjacentsprocket wheels having, respectively a different number of teeth orpockets, mechanism for slowly rotating one of the sprocket wheels,andineans for clutching the other sprocket wheel to its neighbor or tothe stationary support, whereby a hoisting chain may be fedditierentially or may be an chored and given a direct pull.

My invention is hereinafter niiore fully described in connection with anapprove embodiment thereof and the essential char- In the drawings,Figure l is a side elevation of my hoisting mechanism; Fig. 2 is avertical section along the main shaft; Fig. 3 is an end view lookingfrom the right hand end of Fig. 1; Fig. d is a vertical section throughthe driving mechanism on the line l t of Fin. 2 looking toward the left;Fig. .3 is a vertical section onthe line of Fig". 2 looking toward theright; Fig. 6 is a detail illustrating the braking device.

in the drawings, 10 indicates a suitable form having; standards ll and12 in which is iournaled a shaft. l3. Keyed on this shaft a sprocketwheel 15. Slidably mounted on the shaft is an adjacent sprocket wheelU). The sprocket wheels 15 and 16 have respectivelv different nuinliersof teeth. For instant-e one of them may have eighteen teeth and theothcrnineteen. for theparticular nuinhcr immaterial. The sprocket teeth mayhe of any desired form, according to the chain with whit they are tocoiiperate. As shown, they are o' the usual pocket con struction and areadapted to receive an or- The two sprocket wheels 15 and 16 are prm'idedon their adjacent sides with clutch teeth iZl'and 22, which are designedto court to lock the two sprockets together, when desired. JJlien solocked (as shown inFigs.

slow movement in one direction or one other the Dullc Y 16 is clutchedwith. the nulls" in 69 secured. thereto. almond the ilatc x a a 1 l F sv i.

tile diiierential action slackens on the reach oh each oi these shaftsi2 carries two ccwl'iene'rer the reach 32 is pulled, and, ac-' centrics7i and 75. 'lhcsc two pairs oi cc Yokes To and T? which have internalgear teeth 7e meshing:

l l l cordingly, the load pulley 2'31 12; given a, very I centric-s aremounted in two for the same rotation of the main slut with the teeth ofa spur gear rigid on H which gives a rapid movement with (the the shaft13 The result of the above condirect action. The actual direction whichstruction is that, as the motor drives the the rotation of the shaftgives to the lifting shaft Hi, this. through. the gear and (the s pulley31 under these circumstances do eccentrics, gyrates ihc two yokes (onehal-- pends on which sprocket 15 or l'o' has the ancing the other),whicl I gives a very slow arger number of teeth. As shown in therotatim'i to the spur gear and thus to the rawings, the sprocket .15 hasthe larger shaft 1 1o drive the-hoisting pulleys.

number of teeth, so that a right hand rota Keyed on the shaft (i-l is abushing on tion of the main shaft pulls on the reach 32 the squaredportion of which are mounted s farthenthan it slackens on the reach 30,friciion risks 31 pressed toward a disk tins raising the load,Accordingly, as which is loose on the bushing. This disk shown, theright hand rotation rah s the has a cvlindrical 'la nge carrying rigidload whether the mechanism is diil'crcntial teeth with which coacts apawl Sic lrhen 29 or direct, or, if desired, one of these more i theshaft is turned in the dirccti on to raise ments could he the reverse ofthe other by the load, the friction disks and the disk 82 simplycarrying the larger number of are rigid with the shaft in the directionsprocket teeth on the other sprocket. allowed by the pawl 84, the pawlclicking i ny convenient means may he employed idly over the teeth.iVhen the rotation 25 for shifting the movable sprocket and hold--sto'is, however, the pawl )rc\'e1ii"s backward. 90 ing it in eitherextreme position. I hare I rotation of the disk 82, and this allowsfound. it very satisfactory to employ a shittbackward rotation of theshaft only by the able bar 50 slidahly guided on the hase l0 slipping ofthe friction disks. The fricand having a pair of rollers 51 and lyingtion disks are pressed together on this so on opposite sides of the disk24; and for backward rotation by means of the teeth of r shifting thisbar I provide an eccentric 5 1- the clutch ineinl-ier (ll cannning thewheel 63 lying between the lugs 55 of the liar. fho 1 toward Elie brake.eccentric is mounted on a shaft 56 journaled I shown, the brakecomprises a, series of in the frame and connected, rigidly with an Idisks 81 alternately loose on the bushing and operating rock lever 5'7.This lever preferconnected. with it, the loose disks having ably extendsnormally in approximately I projecting portions 85 extending intosuithorizontal position in which its own weight I ahle pocki-ts in thehinge of the disk 82, may hold it, wherefore, to change the opand suchis the form illustrated, though it eration from difiercntial to direct,and. vice to he understood that any number of disks are versa, it isonly necessary to throw the lever may he used. as her ssary. Thefricilion over to the opposite position, which this inecllanis providesmay" be Any suitable mechanism may be our suiiicicnt to make thehoisting device sellployed for rotating the shaft 13. I have locking, ifdesired, and is particularly shown a satisfactory oevice for thispurpose valuable when the incchai'iism is directly ,gg adapted to bedriven by an electric motor driven with the sprocketwheel 10 held slaandgive the desired slow rotation to the tionary.

shaft 13. ll rat mechanism will now be de- The above described gyratorydriving ib d, i'i'icchanisni and'friction brake are claimed 60, in Fig.1, indicates an electric motor, in my prior l a'lentsi os. 757,333 and946,253, so the armature shaft of which carries a pin- I to whichreference is made for fuller dc- L ion (32. lh'is pinion meshes with aspur srription. In the present mechanism, when gear 63 on ashaft 34.,but constantly clutched i the sprocket wheel 16 is locked to itsneightherewith by means of a. clutch member 51 her, the diil erentialpulley itself makes a rigid with the shaft. This shaft is alinedself-lockii'ig hoist, so tiat a brake rnccha- 55 with the shift 13 andshown as su; ported iiism is unnecessary. Accordinglyflprovide 5 in lran'ic iudards 65 and 56. The latter. for throwing out the pawl 84 whenthe two is preferably of disk-like form and sprocket wheels are clutchedtogether. This enacts with the frame member 12 to form a is:wcoinplislicdsimply by extending the slide suitable casing about someof the mecha-- i 50 and providing it with a cam shoulder 87 as p whirhcoacts with the tail 88 of the pawl to n the shalt or 18 a pinion '70Silli'L n to idle position when the slide is l es with a pair of spurrears Tl aimed in that direction.

1 thereof. Therm gears are llaiiug thus described my invention, whatiwhich ariournalcd in claim is: !2l{'i ll; and in i, bordilce casl. Thecombination of twosprockct \vhecls ping lieving the brake when the loosesprocket is having respectively: different numbers of teeth, a chainformed in a loop and wraparound both sprocket wheels,,means for lockinone of the wheels to the other or to an independent device, abrakeadapted to retard the rotation of the other wheel, and

means for automatically rendering the brake inactive when the sprocketwheels are locked toeach other and active when one of them is locked tothe independent device.

2. in .a hoisting mechanism, the combination of two adjacent sprocketwheels having respectively different numbers of teeth, a chain formed ina loo and wrapping around both sprocket W eels, means for clutching oneof the sprocket-wheels to its neighbor or toa stationary evice, asdesired, a brake'adapted to retard the rotation of the other wheel, andmeans for concurrentlp applying the brake and causing said clutc ing tothe stationary device.

3. The combination of a shaft, a pair of adjacent sprocketwheelsthereon, one tight on the shaft and one loose on the shaft, a stationarydevice on that side of the loose sprocket, which is opposite to thetight sprocket, means for shifting the loose sprocket alternatively intoengagement with the tight sprocket or the stationary device, a brakeadapted to retard the rotation of the shaft and means for automaticallyrelocked to the tight sprocket.

l. In a hoisting mechanism, the combina tion of a shaft, a pair ofsprocket wheels thereon having respectively different numbers of teeth,one of said sprocket Wheels being fast on the shaft and the other loose,a chain formed in a 100 and Wrapping around both sprocket w eels, meansfor shifting one of said sprocket wheels to clutch it with its neighboror with a stationary device, a brake on said shaft adapted to act in onedirection of rotation thereof, and mechanism for throwing said brake outof acticm concurrently with the shifting of the movable pulley.

The combination of a shaft, a pair of sprocket wheels havingrespectivelydifferent numbers of teeth, one rigid on the shaft and theother loose on the shaft and shiftable, means for clutching theshiftable wheel with its neighbor'in one position and with a stationarydevice in the other position, an eccentric shaft, means engaging saidshaft for shifting said pulley, a brake on said first mentioned shaftadapted to act when rotated in one direction, and mechanism for throwingsaid brake out of action by the means for shifting the movable pulley.

6. The combination of two independent sprocket wheels havingrespectively different numbers of teeth, means for driving one of-saidwheels, a chain looping around both sprocket wheels, a brake comprisinga ratchet wheel frictionally connected with the driving device to rotatewith-it and a pawl. adapted to: engage the ratchet wheel and preventbackward rotation of it means for relieving the friction of the brake toallow backward turnin of the driven wheel independently of the ratchet,and shiftable mechanism adapted to connect the loose j sprocketwheelwith the driving device and withdraw the pawl from coaction with theratchet wheel.

7. In a hoistin mechanism, the combination of two in ependent sprocketwheels having different numbers of teeth, a stationary device, means forclutching one of said sprocket wheels alternatively to the othersprocket wheel or to said stationary device, a chain wrapping aroundboth sprocket wheels having two upwardly extending loops, a load pulleyin one of said loops, a loose pulley in the other loop, and a flexibleconnection extending over a sheave and having each end attached to oneof said pulleys. y

In testimon whereof, I hereunto affix my signature in t e presence oftwo witnesses.

' EDWARD YOUNG MOORE.

Nitnessesi O'rro SHIMA, JoHN R. Means.

